I have an '04 6.0 FX4 (136k miles) with an edge juice with attitude tuner, egr delete, mbrp exhaust, airbags, I just got front and back breaks done (pads + rotors) and have less than 700 mi on new Falken Wild Peak 325/65/18 all terrains (which are bad *** tires btw- way Better than my old nittos)

I am taking a 1200 mile trip towing 2 jetskis (approx 2200lbs incl single axle trailer). I will only my be in the TN mountains for About 150 miles. The rest of the trip will be flat...

My questions are elementary- is there any reason to use the 'towing' setting on the tuner for this trip considering the small amount of weight I am pulling? Should I use the 'mileage' setting or the 'drive' setting when on the flat highway? The trailer is only 1 year old and has 13" wheels and 175/80d tires- how fast can I go and still be safe??

I have a spare for the trailer...is there anything else I should consider ? I've never towed anything more than 200 miles at a time...

You won't even know it's there. If you can't see your trailer in your mirrors, add a flag so you can see if it is still there as you drive. As for how fast you can drive, all you can do is slow down if the trailer starts whipping at 75-80, but I really doubt you will have any trouble at all. There is no reason you should need any towing tune for this light a load.

Oh, if you should blow a trailer tire on the freeway, be calm, turn off the cruise and coast to a stop. Do not hit the brakes, or at least be very light and smooth with the application. If you get hard on the brakes to get to the side, the trailer COULD try to pass you and then you have a problem. Make sure you have a lug wrench for the trailer lug nuts.

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